NETA’s ANSI/NETA standards are some of the most useful publications for the electrical power testing industry. The standards provide guidance to those trying to maintain our fragile electrical infrastructure.  Safety, reliability, and quality were the core principles that drove NETA to pursue the creation of a set of industry standards for electrical power equipment and systems. NETA is accredited by …

Transformer differential protection (ANSI 87), which operates on Kirchhoff’s Current Law (KCL),  is one of the most common protection methods for large power transformers. This method was first implemented using electromechanical relays built with instrument transformers and other electrical components to convert secondary currents from amperes to per-unit to apply KCL properly. For a detailed explanation of the operation of …

Medium-voltage (MV) cables serve as the backbone of a distribution system, playing a vital role in ensuring the reliable supply of electricity. However, maintaining this extensive network comes at a significant cost for operators. Off-line partial discharge (PD) testing emerges as a valuable tool in managing operating costs and enhancing the reliability of MV cable systems. By transitioning from traditional …